content: /*
   * Copyright 2016-present David Karnok
   *
   * Licensed under the Apache License, Version 2.0 (the "License");
   * you may not use this file except in compliance with the License.
   * You may obtain a copy of the License at
   *
   *     http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   */
  
  package hu.akarnokd.rxjava3.basetypes;
  
  import java.util.concurrent.TimeUnit;
  
  import org.reactivestreams.Subscriber;
  
  import io.reactivex.rxjava3.core.Scheduler;
  import io.reactivex.rxjava3.disposables.Disposable;
  import io.reactivex.rxjava3.internal.disposables.DisposableHelper;
  
  /**
   * Emit the terminal events on the specified Scheduler.
   */
  final class NonoDelay extends Nono {
  
      final Nono source;
  
      final long delay;
  
      final TimeUnit unit;
  
      final Scheduler scheduler;
  
      NonoDelay(Nono source, long delay, TimeUnit unit, Scheduler scheduler) {
          this.source = source;
          this.delay = delay;
          this.unit = unit;
          this.scheduler = scheduler;
      }
  
      @Override
      protected void subscribeActual(Subscriber<? super Void> s) {
          source.subscribe(new ObserveOnSubscriber(s, delay, unit, scheduler));
      }
  
      static final class ObserveOnSubscriber extends BasicRefNonoSubscriber<Disposable> implements Runnable {
  
          private static final long serialVersionUID = -7575632829277450540L;
  
          final long delay;
  
          final TimeUnit unit;
  
          final Scheduler scheduler;
  
          Throwable error;
  
          ObserveOnSubscriber(Subscriber<? super Void> downstream, long delay, TimeUnit unit, Scheduler scheduler) {
              super(downstream);
              this.delay = delay;
              this.unit = unit;
              this.scheduler = scheduler;
          }
  
          @Override
          public void onError(Throwable t) {
              error = t;
              DisposableHelper.replace(this, scheduler.scheduleDirect(this, delay, unit));
          }
  
          @Override
          public void onComplete() {
              DisposableHelper.replace(this, scheduler.scheduleDirect(this, delay, unit));
          }
  
          @Override
          public void run() {
              Throwable ex = error;
              if (ex != null) {
                  error = null;
                  downstream.onError(ex);
              } else {
                  downstream.onComplete();
              }
          }
  
          @Override
          public void cancel() {
              upstream.cancel();
              DisposableHelper.dispose(this);
          }
      }
  }
  